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Zincian högbomite as an exploration guide to metamorphosed massive sulphide deposits

Published online by Cambridge University Press:  05 July 2018

Paul G. Spry  and
Erich U. Petersen
Paul G. Spry
Affiliation:
253 Science I, Department of Geological and Atmospheric Sciences, Iowa State University, Ames, Iowa 50011, USA
Erich U. Petersen
Affiliation:
717 Browning Building, Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112, USA
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Abstract

Zincian högbomite (ZnO 3.5–10.5wt.%) occurs as an accessory phase in garnet quartzite that is intimately associated with the Broken Hill and Black Mountain Cu-Pb-Zn-Ag deposits, Aggeneys, South Africa. Högbomite coexists with a number of minerals including quartz, gahnite, sillimanite, sphalerite, pyrrhotine, pyrite, magnetite, and ilmenite, suggesting that högbomite may have formed by sulphidation and oxidation reactions. Such reactions may account for the high Zn content of högbomite. Where associated with metamorphosed massive sulphide deposits högbomite is enriched in Zn relative to that found in ultramafics, Fe-Ti deposits, Fe ores, aluminous metasediments, and skarns. This enrichment in högbomite constitutes a potential exploration guide for metamorphosed massive sulphide deposits.

Keywords

zincian högbomitesulphidation-oxidation reactionsAggeneysSouth Africamassive sulphidesexploration guide
Type
Research Article
Information
Mineralogical Magazine , Volume 53 , Issue 370 , April 1989 , pp. 263 - 269
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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